NaturalCycles app uses a woman's temperature to predict when she is fertile

Natural Birth Control? There's an App for That​

Contraceptive app Natural Cycles is being blamed for 37

The Birth-Control App Natural Cycles Just Got FDA Approval

Fertility awareness methods: Can apps with calendar, temperature

Natural Cycles Backgrounder

This app is certified in the EU as a form of birth control. Is the

NaturalCycles app uses a woman's temperature to predict when she

Birth Control App Natural Cycles Is More Effective Than the Pill

Fertility Apps Are Multiplying. But Are They Reliable? - WSJ